Mongoose bulkwrite update - how to push new obj into an array? - node.js

Question

I have a model that looks like:
fname: String,
lname: String,
rating: [{
rating: {
type: Number,
enum: RATING,
default: 5
},
date: {
type: Date,
default: Date.now
}
}]
I need to perform updates on this Model by adding new object inside the rating array, with new ratings and dates. I would like to use the bulkwrite method on Model.collection to do this because I need to enable bulk updates so that I don't have to update them one by one.
I created an array bulkUpdateOperations = [] and did the following in a loop:
bulkUpdateOperations.push({
'updateOne': {
'filter': {'_id': item.id},
'update': {$push: {rating: {'rating': item.rating, 'date': Date.now}}}
}
});
Person.collection.bulkWrite(bulkUpdateOperations, {orderd: true, w: 1}, callbackfunc);
But nothing gets updated. I get the following response:
...
...
...
insertedCount: 0,
matchedCount: 0,
modifiedCount: 0,
deletedCount: 0,
upsertedCount: 0,
upsertedIds: {},
insertedIds: {},
n: 0 }
I would be very thankful if someone helped me through this problem.
EDIT
Here is the array I'm sending as POST body to update the records:
[{
"id": "5b7d4d348151700014d25bdd",
"rating": 1
},{
"id": "5b771d10c1e03e1e78b854c2",
"rating": 1
},{
"id": "5b771d7ac1e03e1e78b854c8",
"rating": 1
},{
"id": "5b7bd75a33f88c1af8585be0",
"rating": 1
},{
"id": "5b814a2322236100142ac9f6",
"rating": 1
}]
And here is a sample collection in the DB
{
"_id": {
"$oid": "5b7d4d348151700014d25bdd"
},
"status": "ACTIVE",
"fname": "mr. client",
"lname": "good client",
"contact_info": {
"_id": {
"$oid": "5b7d4d348151700014d25bde"
},
"mobile_no": "0011223344",
"phone_no": "11223344"
},
"handlers": [
{
"_id": {
"$oid": "5b7d4d348151700014d25bdf"
},
"date": {
"$date": "2018-08-22T11:47:00.544Z"
},
"id": {
"$oid": "5b7d45fbfb6fc007d8bdc1f4"
}
}
],
"onboarding_date": {
"$date": "2018-08-22T11:47:00.551Z"
},
"rating": [
{
"rating": 5,
"_id": {
"$oid": "5b814a8e22236100142ac9fc"
},
"date": {
"$date": "2018-08-25T12:22:59.584Z"
}
},
{
"rating": 3,
"_id": {
"$oid": "5b814a8e22236100142ac9fb"
},
"date": {
"$date": "2018-08-25T12:24:46.368Z"
}
}
],
"__v": 0
}
EDIT
Adding upsert: true as a filter for updateOne creates a new document with only rating as its value.
SOLUTION
replace
'filter': {'_id': item.id},
by
'filter': {'_id': mongoose.Types.ObjectId(item.id)},

Answer 1

changing
bulkUpdateOperations.push({
'updateOne': {
'filter': {'_id': item.id},
'update': {$push: {rating: {'rating': item.rating, 'date': Date.now}}}
}
});
to
bulkUpdateOperations.push({
'updateOne': {
'filter': {'_id': mongoose.Types.ObjectId(item.id)},
'update': {$push: {rating: {'rating': item.rating, 'date': Date.now}}}
}
});
worked. Notice the type cast I had to manually perform in
'filter': {'_id': mongoose.Types.ObjectId(item.id)},
I thought mongoose would automatically cast the string to an ObjectId type, but maybe because I'm dropping down a level of abstraction by using Person.collection, mongoose did not auto-cast the itemId.
Please feel free to update this answer if anyone can confirm why I had to cast the string manually.